JP2912230B2 - Portable printer and its assembling method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable printer and a method for assembling the same, and more particularly to a portable printer having a waterproof and drip-proof function and a method for assembling the same.

[0002]

2. Description of the Related Art FIG. 3 is a perspective view showing an example of a conventional portable printer.

[0003] Referring to FIG. 3, in this conventional printer device, a platen 33 and a printer head 34 are mounted on a printer main body 35, and a paper feed / feed
A feed knob 31 for returning the print head and a release lever 32 for releasing / fixing the printer head 34 are provided.

[0004] A portable printer attached to a portable information device is used outdoors, and may be used especially during rainfall. For use in such an environment, the waterproof and drip-proof structure of the main body of the portable printer must be considered.

A feed knob 31 for feeding / returning a sheet
Release lever 3 for releasing / fixing the printer head 34
In the conventional portable printer having the printer head 2 shown in FIG. 3, the entire printer main body shown in FIG. 3 is housed in a housing (not shown). When performing the operation, the user opened the housing cover (not shown).

[0006]

In this conventional portable printer, the entire printer main body including the feed knob and the release lever of the printer head is housed in a housing, so that paper feeding / returning and the printer head can be performed outdoors. When releasing / fixing, the housing cover was opened and the feed knob and the release lever of the printer head were operated.

If the feed knob and the release lever are simply taken out of the housing in order to enable operation outdoors without opening the housing cover, the feed knob and the release lever escape to the upper and lower covers of the housing by the diameter of the feed knob. Therefore, there is a problem in that it goes against miniaturization that is convenient for carrying.

In other words, the conventional portable printer does not have a waterproof / drip-proof countermeasure for the main body of the printer, so that there is a problem in that when the device is operated outdoors during rainfall, there is a problem.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a portable printer and a method of assembling the same, which prevent the water from entering the housing from the feed knob and the release lever.

[0010]

According to a first aspect of the present invention, there is provided a portable body in which a printer main body having a feed knob for feeding / returning paper and a release lever for releasing / fixing a printer head is housed in a housing. in use the printer, the pre
A portable printer is provided in which an O-ring is attached to the outer periphery of a shaft portion of an operation knob that functions to operate the feed knob and to function the release lever by being attached to a printer main body portion and performing a rotation operation.

[0011]

[0012]

According to the second aspect of the invention, there is provided a portable device having a configuration in which a printer main body including a feed knob for feeding / returning a sheet and a release lever for releasing / fixing a printer head is housed in a housing. An operation knob for operating the feed knob and operating the release lever by a pushing / pulling-out operation and a rotating operation with respect to the housing, and the operation knob after the printer main body is attached to the housing. A method for assembling a portable printer, comprising: inserting an O-ring around an outer periphery of a shaft portion; inserting a shaft portion of the operation knob into a stepped through hole of the housing; Is obtained.

[0014]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a partial sectional view showing a configuration on a platen shaft according to an embodiment of the present invention. FIG. 1A shows a state in which an operation knob is pulled out of a housing, and FIG. 1B shows a state in which the operation knob is pushed into the housing. Indicates a state of failure.

Referring to FIG. 1A, a stepped through hole is provided in the center of the side wall 1 of the housing so as to be concentric with the center axis of the platen 2 and the platen shaft 3 integrated with the platen 2. Have been.

A release drum 4 having a tongue-like projection for releasing / fixing the printer head is inserted at the tip of the platen shaft 3 (the left end of the platen 2 in the figure). A spring 5 is inserted in the center of the left end of the release drum 4 at the tip.

Here, the release drum 4 and the spring 5 have a fitting structure rotatable with respect to the platen shaft 3, and one end surface (left end surface in the figure) of the release drum 4 has a sawtooth shape. Is formed.

Further, a joint 8 is interposed at the left end of the platen shaft 3, and a shaft of an operation knob 6 is inserted into the center of the joint 8 through a stepped through hole in the side wall 1 of the housing from the left side in the figure. I have.

A serration shape is formed on the surface of the joint 8 facing the release drum 4 so as to mesh with the serrations on the end surface of the release drum 4. Further, a spline shape that meshes with each other is formed on the outer peripheral surface of the shaft of the operation knob 6 and the inner peripheral surface of the joint 8, and is engaged by press fitting.

Further, a flat surface is provided at the tip 3a of the platen shaft 3, and a hole slightly similar in size to the left end cross section of the platen shaft 3 is formed at the tip (right side) of the operation knob shaft. Have been.

Therefore, when the operation knob 6 is moved in the axial direction, the operation knob shaft is slidably inserted into the platen shaft 3, and when the operation knob 6 is rotated, the operation knob shaft and the platen shaft 3 are directly connected to rotate. Communicate exercise.

In this embodiment employing this structure, FIG.
In the state shown in FIG. 3A, the rotating movement is transmitted to the platen 2 by rotating the operation knob 6, and the paper is fed / returned.

An E-ring 9 is attached to the inside of the casing side wall 1 (right side in the figure) of the shaft of the operation knob 6 to prevent water from leaking outside the casing side wall 1 (left side in the figure). An O-ring 7 for drip-proof is attached.

Next, referring to FIG. 1B, when the operation knob 6 is pushed into the inside of the housing (arrow A) from the state shown in FIG. 1A, the operation knob shaft moves rightward on the platen shaft 3. The serration shape of the joint 8 slid and press-fitted into the tip (right end) of the operation knob shaft meshes with the serration shape of the release drum 4, and the rotational motion of the operation knob 6 is transmitted to the release drum 4. In this state, the spring 5 is compressed between the release drum 4 and the joint 8.

Therefore, when the operator rotates the operation knob 6 in the direction of arrow B, the release drum 4 also rotates in the same direction and the tongue-like projection pushes back the printer head (not shown). / Fixed.

When the operator releases the operating knob 6 from this state, the operating knob 6 returns to the state shown in FIG.
The connection with is released.

Next, a method of assembling the portable printer according to the present embodiment will be described with reference to FIG. FIG. 2 is an exploded perspective view for explaining a method of assembling the parts shown in FIG.

The portable printer of this embodiment having a printer body having a feed knob for feeding / returning a sheet and a release lever for releasing / fixing the printer head is housed in a housing. Assembled by

First, the release drum 4 having the tongue-shaped protrusions 4a is inserted up to the base of the tip 3a of the platen shaft 3 integrated with the platen 2, and the spring 5 is inserted into the tip of the tip 3a. .

The printer main body provided with the platen 2 having this configuration is mounted and fixed in a housing.

Next, an O-ring 7 is inserted on the outer periphery of the shaft of the operation knob 6, and the tip of the shaft of the operation knob 6 is inserted into the stepped through hole 1a of the inner wall 1 of the housing from outside the housing. Then, the joint 8 is interposed to engage with the tip of the platen shaft 3, and the retaining E-ring 9 is attached to the groove 6 a provided on the outer periphery of the shaft of the operation knob 6 to fix the operation knob 6. .

[0033]

As described above, the portable printer assembled by the assembling method of the present invention has a printer main body having a feed knob for feeding / returning paper and a release lever for releasing / fixing the printer head. In a portable printer with the
At the outer periphery of the shaft of the operation knob , which operates the feed knob and also functions the release lever by rotating operation
By inserting the O-ring, a waterproof and drip-proof function can be provided by a simple assembling method, so that the operability outdoors can be significantly improved.

[0034]

[Brief description of the drawings]

FIGS. 1A and 1B are partial cross-sectional views illustrating a configuration on a platen shaft according to an embodiment of the present invention. FIG. 1A illustrates a state where an operation knob is pulled out of a housing, and FIG. 1B illustrates a state where the operation knob is pushed into the housing. Is shown.

FIG. 2 is an exploded perspective view for explaining a method of assembling the portion shown in FIG.

FIG. 3 is a perspective view showing an example of a conventional portable printer device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing side wall 1a Stepped through hole 2 Platen 3 Platen shaft 3a Tip 4 Release drum 4a Tongue-shaped protrusion 5 Spring 6 Operation knob 6a Groove 7 O-ring 8 Joint 9 E-ring

Continuation of the front page (56) References JP-A-4-80057 (JP, A) JP-A-61-61881 (JP, A) JP-A-61-95967 (JP, A) JP-A-62-170374 (JP, A) JP-A-63-230449 (JP, A) JP-A-59-153255 (JP, U) JP-A-62-94850 (JP, U) JP-A-1-68846 (JP, U) JP-A 54-34740 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B41J 11/38 B41J 3/36 B41J 29/13

Claims (2)

(57) [Claims] 1. A portable printer in which a printer main body having a feed knob for feeding / returning a sheet and a release lever for releasing / fixing a printer head is housed in a housing, and is mounted on the printer main body and rotated. An O-ring is provided on the outer periphery of the shaft of the operation knob for operating the feed knob and operating the release lever by operation.
A portable printer characterized by being inserted . 2. A feed knob for feeding / returning a sheet.
Release lever for releasing / fixing the print head
Carrying the printer main body inside the housing
In the method of assembling a belt printer, a pusher for the housing is provided.
Feeding / retracting operation and rotating operation
Activate the knob and activate the release lever
An operation knob is provided, and the printer main body is mounted on the housing.
After attaching the O-ring around the shaft of the operation knob
Insert and attach the tip of the shaft of the operation knob to the step of the housing
Insert it into the through hole and attach it on the same axis as the platen shaft.
And a method for assembling a portable printer.